long skipped = stream.skip(5);
            assertEquals(5, skipped);
            assertEquals('5', stream.read());
            assertEquals('6', stream.read());
        }
    }

    public void test_markAndReset() throws Exception {
        // Create a temporary file with test data
        File tempFile = File.createTempFile("test-", ".tmp");
        try (FileOutputStream fos = new FileOutputStream(tempFile)) {